Jin Yuelin’s students recalled his teacher: He is tall and dignified, sometimes he wears suits and leather shoes, holds a cane, and wears sunglasses, looking like a British gentleman; sometimes he wears a sweatshirt, shorts, and sneakers, and he raises his hands and feet like a well-trained athlete ;Sometimes I wear a Chinese-style robe over a suit and an old eight-way cotton military cap... Jin Yuelin usually always has a straight waist, suits and leather shoes, and leather shoes that are shiny, and there is absolutely no dust on them.Wearing shorts in summer must also wear stockings, because at the time, gentlemen must wear stockings when wearing shorts.

Jin Yuelin wears a fedora all the year round and never takes it off when entering the classroom.At the beginning of each school year, when teaching a new class of students, his first sentence is always: "My eyes are wrong, I can't take off my hat, it's not disrespect to you, please forgive me." Changsha Temporary University was established in a hurry, and the school buildings were in short supply. The departments of the Faculty of Arts were temporarily relocated to Nanyue.At that time, the philosophers in Nanyue included Feng Youlan, Jin Yuelin, Tang Yongtong, Zheng Xin, and Shen Youding.In addition to intense lectures, scholars also joked with each other.Feng Youlan expressed different opinions on a line of Wu Mi's poem "Bringing red sleeves is not spring"; Jin Yuelin has photophobia and often wears a pair of glasses; Zheng Xin likes to drink; Shen Youding used paper instead of yarrow to study the method of divination in the Book of Changes .Wen Yiduo wrote a poem because of this: Only philosophy is the most cunning, Jin Gong blindfolds Zheng Gong's cup, recites poems and horses comment on red sleeves, and divination uses three pieces of paper.

Wang Zengqi recalled Jin Yuelin: the front brim of the woolen hat was lowered, and the head was always slightly raised.He later got a pair of glasses, one with a white lens and one with a black lens.This is even more strange.Later, when I was giving lectures in the United States, my eyes were healed—it was better, and my glasses were changed, but the posture of slightly tilting my head has not changed.He is quite tall, and he often wears a tobacco-yellow suede jacket, with a long camel-colored cashmere scarf wrapped around it when the weather is cold. Ren Jiyu, Jin Yuelin's student and director of the National Library of China, recalled his teacher: "He is very casual, and the professor is not as casual as him. Sometimes he walks around on the podium, let alone, sometimes he just sits at the teaching desk. He is facing everyone and giving lectures there. He also has a characteristic, he doesn’t write, rarely writes on the blackboard, and he also brings a piece of chalk, but it’s useless.”

Xu Zhimo once described the wonderful appearance of Jin Yuelin and a Western woman named Lilin when they first arrived in Beijing: "Old Jin has messy hair, an ugly face that hasn't been washed for five days, and his clothes are more expensive than those in Russia. The beggar has an even more ragged dress and bad feet; Miss Lilin is even better, with taller hair and a darker head than his, and an old lady in a very large antique apricot yellow satin. The sheepskin robes belonged to Lao Jin’s grandfather, and they were wearing a pair of leather shoes that were as tattered as rotten banana skins... Although it was still early in the morning, at least their strange looks could not escape the snobbery of the bureaucrats in Beijing. The anger and attention of the dogs. A group of yellow, white, black, and even variegated dogs coaxed together and formed a large team to follow behind them, howling, which means that we have seen beggars before, but we have not seen your unscrupulous dogs. In order to maintain human dignity and street law and order, we have to raise our voices to express our extreme contempt and disgust to you! Behind this group of dogs, there is a large group of wild children, and the philosophers are all gone. , all the dogs bark, all the children clap their hands!"